Ablock with mass m = 5.6 kg is attached to two springs with spring constants kleft = 35 n/m and kright = 52 n/m. the block is pulled a distance x = 0.21 m to the left of its equilibrium position and released from rest.
1) what is the magnitude of the net force on the block (the moment it is released)?

Which type of wave can travel without a medium

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?

During the past 150 years in the united states, how did energy consumption compare to population growth